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a=v2-v1
t
a=70-50
20
a=1m/s²
2.
f=60N
m=12kg
f=ma
f/m=a
a=60/12
a=5m/s²
3,
m=20kg
a=4m/s²
f=20x4
f=80N
4.
h=1/2gt²
h=1/2(9,8)(3)²
h=44,1m
2). a= 60/12 = 5 m/s^2
3). F= m*a = 20*4 = 80N
4). h= 1/2 * 9.8 * (3)^2 = 44.1 m